360 Systems 2470SD Time Delay - Manual (Page 25)

Appendix • 25
GPI Connector
The GPI connector outputs are used as System Monitor outputs to indicate error conditions and
system failures. These open-collector outputs may be used to source current to drive an external
LED or control input. They should not be connected to any voltage greater than 12 volts. Care
should be taken when interfacing to other equipment that there is not a significant difference in
potential between the system grounds or the AC supplies.
GPI CONNECTOR INTERFACING SHOULD ONLY BE
UNDERTAKEN BY QUALIFIED ELECTRONICS TECHNICIANS.
GPI Connector Pinout
System Monitor Outputs and Error Conditions
The SYSTEM Error is activated whenever there is an over temperature condition of the chassis or
CPU, and any time a power supply voltage is detected to be out of tolerance. The FAN Error
monitors the CPU fan and the internal Drive fan, not the chassis and power supply exhaust fans.
The INPUT Error indicates loss of the entire video signal, not a black picture condition. GENLOCK
indicates loss of signal, but may not be triggered by a noisy or out of spec signal. The COMBINED
Output activates whenever any of the other errors are activated.
Open collector outputs can be wired together to create other combined signals (“wired-or”
connection). You can create a combined error indicator that does not include the GENLOCK error
by wiring pins 12, 23, 24 and 25 together.
Six General Purpose Inputs are present on the DB-25-F connector but are not currently active.
Each is optically isolated from system circuitry, and individual floating returns are provided.
+5 volts may be sourced from pins 21 or 22, or provided by an external source. Current
limiting devices are provided in the unit.
Pin Signal Pin Signal
7 N/C 20 N/C
8, 9, 10 GND 21, 22 +5V Source (200mA max)
11 GPO 2 - GENLOCK 23 GPO 1 - DRIVES
12 GPO 4 - FAN 24 GPO 3 - INPUT
13 GPO 6 - COMBINED 25 GPO 5 - SYSTEM
Pin Signal Pin Signal
1 GPI 1 14 GPI 1 RTN
2 GPI 2 15 GPI 2 RTN
3 GPI 3 16 GPI 3 RTN
4 GPI 4 17 GPI 4 RTN
5 GPI 5 18 GPI 5 RTN
6 GPI 6 19 GPI 6 RTN